MacPro
15 lines
452 B
TypeScript
15 lines
452 B
TypeScript
/**
|
|
* Wraps a function so it is only executed once. Subsequent calls return the cached result.
|
|
*
|
|
* @param fn - The function to execute at most once
|
|
* @returns A wrapper that lazily evaluates `fn` on first call and caches the result
|
|
*
|
|
* @example
|
|
* ```ts
|
|
* const getConfig = once(() => loadExpensiveConfig())
|
|
* getConfig() // loads config
|
|
* getConfig() // returns cached result
|
|
* ```
|
|
*/
|
|
export declare function once<B>(fn: () => B): () => B;
|